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@ARTICLE{Hnninghaus:830215,
      author       = {Hünninghaus, Maike and Koller, Robert and Kramer, Susanne
                      and Marhan, Sven and Kandeler, Ellen and Bonkowski, Michael},
      title        = {{C}hanges in bacterial community composition and soil
                      respiration indicate rapid successions of protist grazers
                      during mineralization of maize crop residues},
      journal      = {Pedobiologia},
      volume       = {62},
      issn         = {0031-4056},
      address      = {München},
      publisher    = {Elsevier},
      reportid     = {FZJ-2017-03789},
      pages        = {1 - 8},
      year         = {2017},
      abstract     = {Decomposition of organic matter is crucial for ecosystem
                      functioning. Microorganisms, which areresponsible for the
                      mineralization of organic matter, are usually treated as a
                      homogeneous functionalguild, despite mineralization capacity
                      can differ profoundly between taxa. In addition, a
                      significant partof the microbial community is top-down
                      controlled by microbial grazers, such as protist. Since
                      protistgrazing is selective, and selectivity differs among
                      species, we hypothesized that protist taxa complementeach
                      other in grazing intensity and thereby affect bacterial
                      community structure and mineralization rate.In a laboratory
                      experiment the species richness of protist communities was
                      manipulated in an arable fieldsoil and the mineralization
                      rate of maize litter residues followed during the
                      decomposition of the labile(4 days) and recalcitrant (3
                      weeks) carbon (C) fractions. Mineralization rate overall
                      increased in thepresence of protists. Changes in microbial
                      function could be related to changes in microbial
                      communitycomposition (measured by phospholipid fatty acids
                      pattern). During microbial decomposition, differentprotist
                      grazers gained influence on mineralization rates over
                      consecutive time intervals, indicating that asuccession of
                      protists caused an enhanced bacterial C-mineralization of
                      plant detritus. Protist identityand species richness
                      affected the microbial community composition, but not the
                      magnitude of itsmineralization function. In general, protist
                      identity appeared to be more relevant for the composition
                      ofthe microbial communities at the beginning of
                      decomposition while the protist species richnessappeared to
                      be more critical in the later, slow phase of decomposition.
                      This study provides an examplethat the overall outcome of
                      ecosystem processes, such as mineralization rate is
                      regulated by the sum ofpositive and negative effects of
                      complex species interactions operating at a very fine
                      spatial and temporalscales.},
      cin          = {IBG-2},
      ddc          = {570},
      cid          = {I:(DE-Juel1)IBG-2-20101118},
      pnm          = {582 - Plant Science (POF3-582)},
      pid          = {G:(DE-HGF)POF3-582},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000403634700001},
      doi          = {10.1016/j.pedobi.2017.03.002},
      url          = {https://juser.fz-juelich.de/record/830215},
}